Vellak, K., N. Ingerpuu, L. Kannukene, M. Leis, and B. Kullman. “New Estonian Records and Amendments. Liverworts and Mosses. Pezizales (Ascomycetes)”. Folia Cryptogamica Estonica, vol. 45, Sept. 2009, pp. 91-93, https://ojs.utlib.ee/index.php/FCE/article/view/13677.